I received my 2009 Mac Pro the day before the new models were announced. Today I've arranged for its return so that I can get a 2010 model. I'm trying to work out the easiest / fastest way to get up and running on the new machine. Currently I have: Internal: Original 640Gb drive: system and user folders. This needs to go back to Apple. 1TB drive: about 300GB of work stuff. This is mine and is not going back to Apple. 1.5TB drive: a Time Machine of the other two drives. This is mine and is not going back to Apple. External 2TB USB2 drive. A Super Duper copy of the system drive (I haven't actually done this yet but will overnight tonight). A Super Duper copy of the work drive (I haven't actually done this yet but will overnight tonight). Option 1: Use Super Duper to copy my current system from the USB drive to the new Mac. Stick the other two drives in and I'm good to go. BUT, is this a bad idea, will the system be okay on a different model Mac Pro? Option 2: Use migration assistant to transfer my stuff from the USB drive? Option 3: Use migration assistant to transfer my stuff from the Time Machine backup? But will it be confused by Time Machine having been used to backup two volumes? Can you even use migration assistant from an internal drive? Option 4: something else? Finally, probably a stupid question, obviously I need to erase the system / user disk before returning it to Apple, am I expected to put a system back on there? Thank you.